Ai Weiwei’s Forever Bicycles, a colossal assemblage of 3,144 bikes, took a crew of workers more than two weeks to put together in Nathan Phillips Square. The sculpture debuted at Nuit Blanche, and will be sticking around until October 27—but the time-lapse video above is, in some ways, even better than seeing it up close.

The video is the work of Ryan Emond, who has done this type of thing a few times before. It gives a great sense of the care that went into building the sculpture, and there are also some really nice bird’s-eye shots of Nuit Blanche crowds swarming the piece during its big debut.